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发明名称
Closure fastening device
摘要
申请公布号
US2216433(A)
申请公布日期
1940.10.01
申请号
US19380186833
申请日期
1938.01.25
申请人
WHEELING STEEL CORPORATION
发明人
CONNER GUY O.;BOCK ERNEST H.
分类号
B21D51/26
主分类号
B21D51/26
代理机构
代理人
主权项
地址
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